Which of the following devices best exemplifies why Wilder's play is an example of modernism? the repetition of phrases the use of contradiction the use of the universal the use of the flashback

The answer is D, Flashbacks

The correct answer is D. the use of the flashback.

This is the only characteristic of modernism among the abovementioned - repetitions, contradictions, and the universal appeared in many other eras as well, but flashbacks were rather important during modernism. Disruptions of the natural flow of narration was a common thing during this era, so it is only natural D should be the correct answer.